Daisy was born unable to produce the major allergen in whey, but also born four weeks prematurely, and, to the surprise of researchers, without a tail.
"We do have evidence that suggests that the lacking tail is due to an epigenetic defect (that affects gene expression rather than the genes themselves), and we believe it is not related to the genetic modification of the calf, but this must be backed up by more results," Wagner said.
The whey-reduced milk still contained other allergenic proteins and even increased casein, the main protein that coagulates to form cheese.
However, getting cows to produce hypoallergenic milk may be far-fetched, according to some researchers.
"While it's an interesting idea, that's not going to eliminate the allergies," said Hugh Sampson, an immunologist at Mount Sinai School of Medicine, who was not involved in the current study.
Because federal law says transgenic milk can't be consumed, the researchers aren't sure what it tastes like yet.
Jabed hopes that isn't the case in the future.
"When I started this project in 2007, it was my dream to see a hypoallergenic cow, I wish in the future we can produce (hypoallergenic) milk and market it and see it in store shelves," he said.
The journal the Proceedings of the National Academy of Science published the research.
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